The best and correct way to do this is to extend the audio not the USB interface. Leave that short and connected close to the computer.
I have seen a few situations and what seems to work well was to have some sort of small footprint mixer in the booth. The VO microphone is connected via balanced XLR to the preamp it is feeding. (ie your interface) Long XLR cables pose no problems.
The output from the interface and a zero latency split from the mic can be fed back into the small mixer in the booth giving the VO person lots of control over their own level and the playback level from the DAW. Software monitoring is not required from the DAW as it is taken care of via the split from the mic feeding back into the VO booth mixer.
Behringer make a perfect mixer for the booth for very low cost.